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Please contact the business for updated hours/services due to the COVID-19 advisory.

General Info
* Full Service for: Residential / Commercial / Industrial * We Have It - See Our Showroom ***Please Visit Our Web Site Or Give Us A Call For More Information***
Business History
For over 60 years, Foster Brothers Security Systems has provided businesses and industrial sector clients with the security solutions they need and deserve. Our company is located in the heart of the Silicon Valley, and we're proud to satisfy the many security and locksmith requirements our clients have. As the valley has grow, so has our business. We serve the needs of hundreds of customers across the Greater San Francisco Bay Area, providing them with a range of security products and solutions including: locks and keys, access control devices, and security systems. Our clients include some of the biggest companies in the country. We take deep pride in providing all of our customers with honest, fast, professional, and economical security installation services and solutions.
BBB Rating
BBB Rating and Accreditation information may be delayed up to a week.
BBB Accredited businesses follow the BBB Code of Business Practices and pay a fee for accreditation review and monitoring. Accreditation is not a BBB endorsement or evaluation of the business’ product quality or competency in performing services.

BBB Rating and Accreditation information may be delayed up to a week.
Regular Hours
Mon - Fri:
* On Call Mobile Units * Security Profession AIS **We Do It All** * Keys * Locks * Electronic Access Control * Door Closers and Hardware * Exit Alarms * Safes
Medeco High Security Locks, access
Payment method
amex, master card, visa, invoicing available, cash, check, debit, discover, all major credit cards
Heritage District

Locksmith License # LC02770

Contractors License # 315373

Other Emails

Keys, Access Control Systems, Bank Equipment & Supplies, Door Closers & Checks, Locks & Locksmiths, Locks & Locksmiths-Commercial & Industrial, Locks-Wholesale & Manufacturers, Locksmiths Equipment & Supplies, Safes & Vaults


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Cam B.



I've used Foster Brothers for 20 years. They are the go to place for anything related to locks and door hardware.

Gregory D.



We had a few companies place a bid for the security system that we needed installed. They placed a very organized and easy to read bid. It was nice to know that we were getting 100% of their work 100% of the time we were working with them.

Mary T.



I would highly recommend the team at Foster Brothers Security Systems. They were easy to work with and helped me understand the products we needed to make sure the business was safe.

Kevin P.



Excellent work! Year after year they impress me with the high quality of work that they do.




Foster Brothers Security consistently exceeds my expectations. I would absolutely recommend them.




The technicians were very helpful in explaining the locks that they placed on the building.